JSTL: iterate list but treat first element differently
39,860
Solution 1
It can be done even shorter, without <c:if>
:
<c:forEach items="${learningEntry.samples}" var="sample" varStatus = "status">
<table class="sampleEntry" ${status.first ? '' : 'style = "display:none"'}>
</c:forEach>
Solution 2
Yes, declare varStatus="stat" in the foreach element, so you can ask it if it's the first or the last. Its a variable of type LoopTagStatus.
This is the doc for LoopTagStatus: http://java.sun.com/products/jsp/jstl/1.1/docs/api/javax/servlet/jsp/jstl/core/LoopTagStatus.html It has more interesting properties...
<c:forEach items="${learningEntry.samples}" var="sample" varStatus="stat">
<!-- only the first element in the set is visible: -->
<c:if test="${stat.first}">
<table class="sampleEntry">
</c:if>
<c:if test="${!stat.first}">
<table class="sampleEntry" style="display:none">
</c:if>
Edited: copied from axtavt
It can be done even shorter, without <c:if>
:
<c:forEach items="${learningEntry.samples}" var="sample" varStatus = "status">
<table class="sampleEntry" ${status.first ? '' : 'style = "display:none"'}>
</c:forEach>
Author by
D.C.
Updated on July 15, 2022Comments
-
D.C. almost 2 years
I'm trying to process a list using jstl. I want to treat the first element of the list differently than the rest. Namely, I want only the first element to have display set to block, the rest should be hidden.
What I have seems bloated, and does not work.
Thanks for any help.
<c:forEach items="${learningEntry.samples}" var="sample"> <!-- only the first element in the set is visible: --> <c:if test="${learningEntry.samples[0] == sample}"> <table class="sampleEntry"> </c:if> <c:if test="${learningEntry.samples[0] != sample}"> <table class="sampleEntry" style="display:hidden"> </c:if>